Homebrewing an entire world in which to set a Dungeons & Dragons campaign may at first seem like way too much work, but it can also be a rewarding and enjoyable process. Homebrewing a custom world to adventure through can allow for both personalized and tailored elements of the role-playing experience, which are often lacking in premade modules.
Source：https://www.cbr.com/dnd-5e-worldbuildling-homebrew-where-to-start/
